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The California Air Resources Board (ARB) has posted Mail-Out #MSC
13-02, titled “The Lower-Emission School Bus Program – 2013 Model
Year Replacement Bus Emission Criteria – Effective January 1,
2013 to December 31, 2013.” ARB staff has reviewed executive
orders for 2013 model year school bus engines and determined that
although some buses will be available from manufacturers at less
than 0.50 grams per brake horsepower-hour (g/bhp-hr) for oxides
of nitrogen (NOx), a significant portion of new buses are
expected to remain at 0.50 g/bhp-hr. Therefore, in order to
ensure that sufficient new buses are available to replace older
buses, ARB maintains the 0.50 g/bhp-hr NOx and 0.01 g/bhp-hr
particulate matter maximum emission criteria for contracts
executed through calendar year 2013.
The Mail-Out may be found on ARB’s webpage at:
http://www.arb.ca.gov/bonds/schoolbus/advisory/advisory.htm .
For more information about the Lower-Emission School Bus Program,
please go to:
http://www.arb.ca.gov/msprog/schoolbus/schoolbus.htm .
If you have questions regarding this Mail-Out, please contact Ms.
Kimya Lambert, Air Pollution Specialist, at (916) 323-2507, or
via email at klambert@arb.ca.gov .
Background:
The primary goal of the ARB's Lower-Emission School Bus Program
is to reduce school children's exposure to both cancer-causing
and smog-forming pollution. The program provides grant funding
for new, safer school buses and to put air pollution control
equipment (i.e., retrofit devices) on buses that are already on
the road.